Mount Asphyxia is a prominent volcanic cone

Volcano

2. Bedrock3. Conduit 4. Base5. Sill6. Dike7. Layers of ash emitted by the volcano8. Flank| 9. Layers of lava emitted by the volcano10. Throat11. Parasitic cone12. Lava flow13. Vent14. Crater15...

 reaching to 550 metres (1,804.5 ft), forming the summit of Zavodovski Island

Zavodovski Island

Zavodovski Island is an uninhabited volcanic island in the Traversay Islands group of the South Sandwich Islands. It lies southeast of South Georgia Island...

, northernmost of the South Sandwich Islands.

The name refers to the suffocating fumes experienced on the island; volcanic fumes spew from the mountain and to this is added the stench of penguin

Penguin

Penguins are a group of aquatic, flightless birds living almost exclusively in the southern hemisphere, especially in Antarctica. Highly adapted for life in the water, penguins have countershaded dark and white plumage, and their wings have become flippers...

 guano

Guano

Guano is the excrement of seabirds, cave dwelling bats, and seals. Guano manure is an effective fertilizer due to its high levels of phosphorus and nitrogen and also its lack of odor. It was an important source of nitrates for gunpowder...

, and the fumes can indeed suffocate a visitor to the island. The same qualities given names to a number of Zavodovski Island's other features.

Argentine hydrographic publications use an alternative name "Mount Curry", after an Argentine sailor who lost his life in naval combat at Colonia, Uruguay, in 1826.